Kate Hudson is feeling cheeky! Proving she's not afraid to show some skin, the 35-year-old Something Borrowed star dared to bare her bum by wearing a thong bikini during a vacation with her family in Ibiza, Spain, Sunday. How does the mother of two maintain her famously fit figure? Aside from genetics (have you seen what her 68-year-old mom Goldie Hawn looks like in a swimsuit lately?!), Hudson's been doing Pilates since age 19.